The correct answer is A. Potassium-argon dating and half-life isotopes
Explanation:
Potassium-argon dating and half-life of an isotope is the only method to determine the ancient archaeological objects beneath the earth's surface.
According to geologists the age of rocks dates back to 4 billion years. These facts are based on the radioactive isotopes of potassium (K-40). This isotope, after its half-life, decays into argon gas (Ar-40).
The comparison of the amount of the isotopes K-40 to Ar-40 gives the information about the time period the rock has formed. This method is quite useful for paleoanthropologists and archaeologists to study human evolution.
Option A, Potassium-argon dating and half-life isotopes
Explanation:
Dating helps in determining the age of old rocks.The age of continental crust is determined by calculating the final weight of rock as compared their initials weight.
The formula for determining the age is as follows -
Where N is the final weight of the radioactive substance with in the continental crust.
is the initial weight of the radioactive substance with in the continental crust.
This is because they transitioned from water where they need them and then became mosses which dont have roots but rather hold in water but as they evolved plants got roots so they can dig deep into the group to reach water resivoirs.
Cell differentiation is common with multicellular organisms. It is the process by which a cell changes from one cell form to another. Cell differentiation makes the change from a zygote to a complex system with different parts.Cells which have been differentiated also becomes specialized. Complex multicellular animals and plants would not be in existence without specialization. This is because cells have specialized functions and each cell is very important to the survival of the organism.
